Seniors plz guide me

Guidance from the seniors
I HAVE THE BACKGROUND OF SCIENCE SUBJECTS AS I DID MY F.Sc PRE-MEDICAL AND B.Sc WITH ZOOLOGY,BOTANY AND CHEMISTRY.I JUST BOUGHT A BOOK FOR OF PYSCHOLOGY OF GRADUATION LEVEL AND I FOUND IT QUITE INTERESTING.ON THE BASIS OF INTEREST AND SPECIFIC COURSE I DECIDED TO OPT FOR IT IN MY CSS EXAM,SO NOW I AM MAKING A REQUEST TO THE SENIORS THAT GUIDE ME ABOUT THIS SUB AND PLZ TELL ME WILL IT BE TOUGH FOR ME?

I WILL BE WAITING FRO THE REPLY.THANKS